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1956 "D"

D
remnants of the supernova of A. D.
daily
daily error
daily map
sidereal mean daily motion
daily revolution
daily rotation
daily variation
Dall-Kirkham telescope
Dalton law
damp air
damped oscillation
damping
damping broadening
damping constant
damping factor
damping wing
Danjon astrolabe
Danjon scale
dark (absorption) nebula
dark adaptation
dark area
dark band
dark cloud
dark companion
dark current
dark dome
law of darkening
darkening coefficient
darkening to limb
dark exposure
dark flocculus
dark Fraunhofer lines
dark hemisphere
dark line
dark material
sky darkness
dark noise
dark obscuring lane
dark obscuring matter
dark room
dark-room illumination
dark side
International Dark Sky association
dark sky background
dark slide
dark star
dark subtraction
dashed term
raw data
data analysis
Hubble data archive
Lyon-Meudon extragalactic database
National Space Science Data Center
digital data presentation
techniques of data processing
data reduction
NASA extragalactic data set
modified Julian date
international date line
date of supernova
D atom
David Dunlap observatory
Dawes limit
false dawn
lengthening of the day
day airglow
day glow
daylight
daylight exposure
daylight hemisphere
daylight saving time
day(light) side
daylit hemisphere
independent day numbers
magnetically quiet days
day sky
day-time meteor
day-time meteor activity
daytime radiant
daytime shower
daytime stream
dazzlernent
free-burning dc arc in air
free-burning dc arc in vacuum
DC comparison radiometer
H and D curve
deactivating collision
dead air
dead reckoning position
dead time
Instituto de Astrofisica de Canarias
heat death
volcanic debris
debris of supernova
de Broglie wavelength
principal source of decameter activity
decameter burst
decameter observations
decameter (radio) sources
decameter radio storm
decameter radio waves
decameter source regions
decameter(-wave) emission
decameter (wavelength) band
decameter (wavelength) radiation
decameter (wavelength) range
decameter wavelength region
decameter wavelengths
decameter waves
decameter(-wave) spectrum
decametric
decametric emission
Instituto de Astrofisica de Canarias
radioactive decay
decayed atom
decay law
decay photon
deceleration
decibel
decimeter burst
decimeter component
decimeter continuum
decimeter observations
decimeter radio waves
decimeter(-wave) emission
decimeter (wavelength) band
decimeter (wavelength) radiation
decimeter (wavelength) range
decimeter wavelength region
decimeter waves
decimeter(-wave) spectrum
decimetric emission
decimillistilb
secular secular in declination
declination and right ascension
declination angle
true declination at date
declination axis
declination(-axis) bearings
declination box
declination-box frame
declination circle
declination determinations
declination drive
declination-drive system
declination gear
declination gear device
declination micrometer
declination motion
declination observations
errors in declinations
declination trunnion
declination worm
decline rate
decollimation
decomposition probability
Fourier deconvolution
Forbush decrease
Balmer decrement
decrement of visual threshold
Centre de Donnees astronomiques de Strasbourg
deep-dust model
solar model in deeper layers
deep sky filter
deep sky object
deep space network
deexcitation
term defect
defective illumination
deferent
define
defining
defining pad
defining support
definition
deflection
deflection angle
deflection drift
defocus
defocusing
nuclear deformation
deformation vibration
resonance degeneracy
degenerate
separably degenerated
triple degenerated species
degenerate electron
relativistic degenerate gas
degenerate gas law
degenerate matter
degenerate star
degenerate state
degrading of bands
square degree
degree of arc
degree of dissociation
degree of ellipticity
degree of freedom
degree of ionicity
degree of ionization
degree of openness of spiral
Observatoire de Haute Provence
time delay
delayed pulse
time delay integration
delay line
delineation of meteor radiants
Dellinger effect
Observatorio del Rogue de los Muchachos
Roque de los Muchachos observatory
Observatorio del Rogue de los Muchachos
, δ
Delta Cephei stars
δ
Observatorio del Teide
demount
dense cluster
varying density
number/flux density count
density difference
probability density distribution
density distribution of hydrogen
variable density filter
density gradient
density in space
density ionization
density law
density of galaxies
mean density of matter
density of plate
electron density per unit length
number/flux density relation
number/flux density statistics
method of dependences
depolarization
depolarization factor
depolarizer
depression
depression of continuum
radar depth
depth of asphericity
depth of focus
Instituto Argentino de Radioastronomia
Institut de radio astronomie millimetrique
image de-rotator
Van der Waals forces
van der Waals interaction
descending node
descriptive astronomy
deserts
homological transform design
de Sitter's model
de Sitter's universe
main control desk
Deslandres-d'Azambuja bands
Deslandres table
Centre de Donnees astronomiques de Strasbourg
destructive interference
electron detachment
detail
detailed balancing
detailed exposure
detailed structure
surface details
limit of detectability
smallest detectable signal
number of detectable sources
correlation detection
overall detection efficiency
coherent detection spectroscopy
detective quantum efficiency
normalized detectivity
X-ray detector
detector image detector
deterioration of image
secular determinant
distance determination
right-ascension determinations
detonating bolide
Centre National d'Etudes Spatiales
stellar deuterium
deuterium line
deuterium line radiation
develop
developability
developed image
developed plate
life of developer
developing
developing bath
developing room
uniform development
sunspot development chart
development curve
development fog
development time
standard deviation
deviation angle
deviative prism
charge coupled device
position-measuring devices
dewar
dew cap
dewcap
dew remover
D F
star diagonal
diagonal group
diagonal line of multiplet
diagonal mirror
diagonal sum rule
two color diagram
sun dial
induced diamagnetism
diameter visual diameter
diameter data
diameter measurement
small (diameter) source
large diameter source
diameter visual diameter
diamond milling
diamond ring
iris diaphragm
diaphragm aperture
diapositive
diatomic molecule
Osservatorio di Bologna
Osservatorio di Brera
dichotomize
dichotomy
dichroic crystal
dichroic mirror
Dicke method
Dicke radiometer
Dicke's arrangement
Dicke's technique
receiver using Dicke switch
Dicke system
Dicke system receiver
astronomical dictionary
dielectric constant
dielectronic recombination
tone difference
difference band
chromatic difference of magnification
difference of path
differential aberration
differential colorimeter
differential coordinates
differential determinations
differentially
differential method
differential motion
differential observations
differential observing
differential refraction
differential refraction effects
differential rotation
differential solar rotation
differential work
differentiation
diffract
diffracting screen
X-ray diffraction
diffraction fringe
diffraction grating
diffraction image
diffraction limited optics
diffraction limited resolution
diffraction maxima
diffraction of radio waves
Fresnel diffraction pattern
diffraction rings
diffraction spectrograph
diffraction spectroscope
diffraction spectrum
diffuse
diffuse band
diffuse galactic light
diffuse interstellar bands
recognizable diffuse levels
diffusely reflecting sphere
diffuse matter
diffuse nebula
to diffuse out
uniform diffuser
diffuse radiation
diffuse radiation field
diffuse reflection
diffuse series
diffuse sunlight
diffuse transmission
diffusing effect
diffusing screen
diffusing surface
neutron diffusion
atmospheric diffusion coefficient
diffusion function
diffusion rate
diffusion velocity
thermal diffusivity
Digges' telescope
binary digit
digital camera
electronic digital computer
digital data presentation
digital method
digital recording system
STScI digital sky survey
digitized sky survey
digitizer
digit printer
potassium dihydrogen phosphat
time dilatation
galactic dilation
dilute aperture
diluted radiation
stellar dilution factor
physical dimension
galactic dimensions
dim vision
tunnel diode
diode noise generator
diode noise source
varactor (diode) parametric amplifier
tunnel diode parametric amplifier
diopter
dioptric
dioptrical
dioptrics
dioptric system
dioptric telescope
dioptrique
carbon dioptry
magnetic dip
dip of horizon
dip of the horizon
half-wave dipole
half-wave (dipole) antenna
dipole antenna
dipole-dipole interaction
dipole feed
dipole moment
dipole-quadruple interaction
magnetic dipole radiation
broadside array of half-wave dipoles
Dirac matrixes
Dirac's equation
Instituto di Radioastronomia
direct colorimetry
direct-current comparison radiometer
direct exposure
scintillation in direction
directional
directional antenna
overall directional diagram
directional discrimination
directional distribution
directional flux
directional information
direction cosines
direction of baseline
direction of galactic center
poorly directive antenna
directive coefficient
source directivity
directivity of radiation
directivity pattern
direct measurement
direct measures
direct motion
direct observations
direct photograph
direct photography
direct plate
direct radiation
direct radiometer
direct ray
direct-reading scale
direct receiver
direct reflection
direct sunlight
direct technique
direct-vision prism
direct vision spectroscope
direct-vision spectroscope
direct wave
direct-writing recorder
dirty image
sudden disappearance
disc
barely discernible
hollow cathode discharge
discharge in vacuum
gas discharge noise generator
radio-frequency discharge tube
discontinuities in flexure
discontinuities in instrumental system
Balmer discontinuity
discover
discoverer
discovery
discrepancies in motion
discrepancy
discrete
discrete band
discrete energy levels
discrete energy state
discrete radio star
discrete source
directional discrimination
discrimination in range
discriminator
spherical dish
twin dish interferometer
dish type radio telescope
spontaneous disintegration
Ramsden disk
disk dial
disk flare
emission from disk of the Galaxy
transit across the disk of the Sun
Stoneyhurst solar disks
radio disk temperature
disk temperature of planet
dismount
cross disperser
dispersing unit
velocity dispersion
dispersion coefficient
Hartmann dispersion formula
dispersion in luminosity of sources
dispersion in velocity
range dispersion of signals
dispersion prism
dispersive power
displaced atom
displaced doublet
displaced term
total displacement
displacement coordinates
Wiens's displacement law
displacements in photographic film
cathode-ray oscillograph display
tidal disruption
disruption theory
image dissector
dissociate
heat of dissociation
dissociation constant
dissociation continuum
dissociation energy
dissociation equation
dissociation equilibrium
dissociation limit
dissociation of galactic cluster
dissociation potential
dissolution of group
north polar distance
distance determination
distance from Earth
distance measurement
distance modulus
relative scale of distances
distance scale
distant antenna
distant galaxy
distant nebula
distant object
distant radio star
distant regions
distant source
distant stars
distorted image
distorted wave front
distorting lens
pin cushion distortion
lens distortion correction
distortion in emulsion
seeing distortions
distributed source
normal distribution
brightness distribution across the source
brightness distribution across the Sun
velocity distribution diagram
distribution in latitude
distribution in longitude
light distribution in seeing image
distribution in space
Maxwellian distribution law
distribution of emission
distribution of galaxies
density distribution of hydrogen
distribution of matter
distribution of radiation
brightness distribution of radio disk
distribution of radio energy
angular distribution of sources
world-wide disturbance
disturbance diurnal
disturbance energy
disturbance to seeing
disturbed
disturbed areas
disturbed day
magnetically disturbed days
disturbed magnetic variation
disturbed region
disturbed Sun
disturbed Sun emission
disturbed Sun radiation
disturbed wave front
disturber
disturbing agency
disturbing effect
disturbing F
disturbing function
dithering
disturbance diurnal
diurnal aberration
diurnal arc
diurnal circle
diurnal inequality
diurnal libration
diurnal method
diurnal motion
diurnal parallax
diurnal rotation
diurnal variation
luni-solar diurnal wave
divergence
divergence angle
divergent
diverging
diverging lens
diverging motion in spot group
divided circle
Gaussian division
division errors
division line
D lines
Dobsonian mounting
dodging
sun dog
Dollond eyepiece
clam shell dome
dome balcony
dome drive
dome rotation
dome seeing
dome shutters
dome slit
dome trucks
dome ventilation
Dominion astrophysical observatory
Dominion radio astrophysical observatory
Centre de Donnees astronomiques de Strasbourg
donor
barn door mounting
Doppler broadening
Doppler displacement
radio Doppler effect
Doppler effect in photodissociation
Doppler effect of thermal motion
Doppler method
Doppler shift
Doppler spread
Dopplers' principle
Doppler velocities
Doppler width
dot image
wide double
double astrograph
double-beam
double-beam photometer
double-beam spectrometer
double-concave lens
double-convex lens
double electron excitation
double elliptical system
double galaxy
double-image micrometer
double-image prism
double interferometer
double nebula
double planet
double refraction
double-slide plate carriage
double source
double star
double star astronomy
double system
achromatic doublet
regular doublet law
doublet line
doublet multiplet
doublet objective
Hartley's law of doublet separating
doublet splitting
doublet state
doublet structure
doublet term
double-wire
Λ(-type) doubling
doubly degenerated species
doubly ionized
stop down
DQE
draconitic month
satellite drag
drain
Henry Draper catalog
Draper classes
draperie
Henry Draper system
draw tube
Dregion
rate of frequency drift
drift curve
drift-curve
drift interferometer
drift rate
drift scan
smart drive